{
  "GSD": {
    "alias": "CVE-2022-20960",
    "description": "A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated.",
    "id": "GSD-2022-20960"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2022-20960"
      ],
      "details": "A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated.",
      "id": "GSD-2022-20960",
      "modified": "2023-12-13T01:19:16.674311Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "psirt@cisco.com",
        "ID": "CVE-2022-20960",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Cisco Secure Email",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "11.0.3-238"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "11.1.0-069"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "11.1.0-131"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "11.1.0-128"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "12.0.0-419"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "12.1.0-071"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "12.1.0-087"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "12.1.0-089"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "13.0.0-392"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "13.5.1-277"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "12.5.0-066"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "14.0.0-698"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "14.2.0-620"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Cisco"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated."
          }
        ]
      },
      "exploit": [
        {
          "lang": "en",
          "value": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory."
        }
      ],
      "impact": {
        "cvss": [
          {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "cweId": "CWE-400",
                "lang": "eng",
                "value": "Uncontrolled Resource Consumption"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV",
            "refsource": "MISC",
            "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV"
          }
        ]
      },
      "source": {
        "advisory": "cisco-sa-esa-dos-gdghHmbV",
        "defects": [
          "CSCwc35162"
        ],
        "discovery": "INTERNAL"
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "24161B2B-DF68-4662-AB40-AD8E6DDDFE25",
                    "versionEndExcluding": "14.2.1-015",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:cisco:email_security_appliance:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "CBB6FCDC-8FC8-4AAF-81E7-FBCA3B189A53",
                    "versionEndExcluding": "14.3.0-020",
                    "versionStartIncluding": "14.3.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "descriptions": [
          {
            "lang": "en",
            "value": "A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated."
          },
          {
            "lang": "es",
            "value": "Una vulnerabilidad en el software Cisco AsyncOS para Cisco Email Security Appliance (ESA) podr\u00eda permitir que un atacante remoto no autenticado cause una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS) en un dispositivo afectado. Esta vulnerabilidad se debe al manejo inadecuado de ciertas conexiones TLS que son procesadas por un dispositivo afectado. Un atacante podr\u00eda aprovechar esta vulnerabilidad estableciendo una gran cantidad de conexiones TLS simult\u00e1neas a un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante hacer que el dispositivo elimine nuevos mensajes de correo electr\u00f3nico TLS que provienen de los servidores de correo electr\u00f3nico asociados. La explotaci\u00f3n de esta vulnerabilidad no hace que el dispositivo afectado se recargue inesperadamente. El dispositivo se recuperar\u00e1 de forma aut\u00f3noma unas pocas horas despu\u00e9s de que se detenga o mitigue el ataque."
          }
        ],
        "id": "CVE-2022-20960",
        "lastModified": "2024-01-25T17:15:22.563",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "ykramarz@cisco.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2022-11-04T18:15:11.347",
        "references": [
          {
            "source": "ykramarz@cisco.com",
            "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV"
          }
        ],
        "sourceIdentifier": "ykramarz@cisco.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-295"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-400"
              }
            ],
            "source": "ykramarz@cisco.com",
            "type": "Secondary"
          }
        ]
      }
    }
  }
}